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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2017 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <console/console.h>
#include <device/pci.h>
#include <device/pciexp.h>
#include <device/pci_def.h>
#include <device/pci_ids.h>
#define CACHE_LINE_SIZE 0x10
/* Latency tolerance reporting, max non-snoop latency value 3.14ms */
#define PCIE_LTR_MAX_NO_SNOOP_LATENCY_VALUE 0x1003
/* Latency tolerance reporting, max snoop latency value 3.14ms */
#define PCIE_LTR_MAX_SNOOP_LATENCY_VALUE 0x1003
static void pch_pcie_init(struct device *dev)
{
u16 reg16;
printk(BIOS_DEBUG, "Initializing PCH PCIe bridge.\n");
/* Enable SERR */
pci_or_config32(dev, PCI_COMMAND, PCI_COMMAND_SERR);
/* Enable Bus Master */
pci_or_config32(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
/* Set Cache Line Size to 0x10 */
pci_write_config8(dev, PCI_CACHE_LINE_SIZE, CACHE_LINE_SIZE);
/* disable parity error response, enable ISA */
pci_update_config16(dev, PCI_BRIDGE_CONTROL, ~1, 1<<2);
if (IS_ENABLED(CONFIG_PCIE_DEBUG_INFO)) {
printk(BIOS_SPEW, " MBL = 0x%08x\n",
pci_read_config32(dev, PCI_MEMORY_BASE));
printk(BIOS_SPEW, " PMBL = 0x%08x\n",
pci_read_config32(dev, PCI_PREF_MEMORY_BASE));
printk(BIOS_SPEW, " PMBU32 = 0x%08x\n",
pci_read_config32(dev, PCI_PREF_BASE_UPPER32));
printk(BIOS_SPEW, " PMLU32 = 0x%08x\n",
pci_read_config32(dev, PCI_PREF_LIMIT_UPPER32));
}
/* Clear errors in status registers */
reg16 = pci_read_config16(dev, PCI_STATUS);
pci_write_config16(dev, PCI_STATUS, reg16);
reg16 = pci_read_config16(dev, PCI_SEC_STATUS);
pci_write_config16(dev, PCI_SEC_STATUS, reg16);
}
static void pcie_set_L1_ss_max_latency(device_t dev, unsigned int offset)
{
/* Set max snoop and non-snoop latency for the SOC */
pci_write_config32(dev, offset,
PCIE_LTR_MAX_NO_SNOOP_LATENCY_VALUE << 16 |
PCIE_LTR_MAX_SNOOP_LATENCY_VALUE);
}
static struct pci_operations pcie_ops = {
.set_L1_ss_latency = pcie_set_L1_ss_max_latency,
};
static struct device_operations device_ops = {
.read_resources = pci_bus_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_bus_enable_resources,
.init = pch_pcie_init,
.scan_bus = pciexp_scan_bridge,
.ops_pci = &pcie_ops,
};
static const unsigned short pcie_device_ids[] = {
PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP1,
PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP2,
PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP3,
PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP4,
PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP5,
PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP6,
PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP7,
PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP8,
PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP9,
PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP10,
PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP11,
PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP12,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP1,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP2,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP3,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP4,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP5,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP6,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP7,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP8,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP9,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP10,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP11,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP12,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP13,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP14,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP15,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP16,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP17,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP18,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP19,
PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP20,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP1,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP2,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP3,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP4,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP5,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP6,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP7,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP8,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP9,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP10,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP11,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP12,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP13,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP14,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP15,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP16,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP17,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP18,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP19,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP20,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP21,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP22,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP23,
PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP24,
0
};
static const struct pci_driver pch_pcie __pci_driver = {
.ops = &device_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.devices = pcie_device_ids,
};
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